A calibration device for a metal pressure core of a pressure sensor

Abstract

The utility model discloses a pressure sensor metal pressure core body calibration device, including constant temperature box, the inside fixed base of constant temperature box, the rear end inside of base is rotatably connected with first threaded rod, and the top of first threaded rod is connected with the bottom of motor and is set up to the inside of constant temperature box, and the bottom of motor is fixed on the top of constant temperature box, the first threaded rod is screw -threaded with the measurer, and the measurer is slidably connected on the base, the inside rotatable connection of base has second threaded rod, and two groups of opposite threads are established on second threaded rod, two groups of threads on second threaded rod are all screw -threaded with mounting plate. This pressure sensor metal pressure core body calibration device is installed with constant temperature box, and the pressure sensor metal pressure core can be heated constant temperature through the use of constant temperature box, and then the measurer is convenient to the detection of pressure sensor metal pressure core, thereby improve the efficiency of detection.

Description

Technical Field

[0001] This utility model relates to the field of metal pressure core calibration technology, specifically a pressure sensor metal pressure core calibration device. Background Technology

[0002] The pressure sensor metal pressure core calibration device is a professional device used to accurately measure and calibrate the performance of the pressure sensor metal pressure core. Its core function is to establish an accurate correspondence between the core input pressure and the output signal through a standardized process, so as to ensure the measurement accuracy, stability and reliability of the pressure sensor throughout its entire life cycle. Existing metal resistor cores will deform under stress, especially under high temperature and high pressure. The resulting deformation is often difficult to recover in real time. Therefore, it is usually necessary to preheat and pressurize to eliminate stress or apply prestress, which leads to low measurement efficiency. To address the aforementioned deficiencies, a testing and calibration fixture for a pressure sensor core, authorized by publication number CN218239165U, is provided. This fixture enables the testing and calibration of the core in a temperature environment of -70°C to 180°C and a pressure of 0 to 5 MPa. In actual use, although the above-mentioned device makes the calibration fixture more adaptable, the pressure sensor core needs to be preheated during testing so that the temperature of the pressure sensor core reaches the calibration temperature. The extra heating will increase the time lost in calibration, thus resulting in poor performance. To address the aforementioned deficiencies, the mandrel support calibration mechanism, authorized by announcement number CN217858016U, involves installing a calibration sleeve onto a calibration fixture, positioning the mandrel support frame within the fixture, and then inserting the mandrel into the support frame from the calibration sleeve, positioning the mandrel between three mandrel support units. The fit between the support rollers and the mandrel is then observed. If the mandrel contacts all three support rollers simultaneously with uniform contact surface size, the three support rollers are accurately positioned and ready for use. Otherwise, the position of the support rollers needs adjustment. During adjustment, a push-pull rod moves a rack, which in turn rotates a cylindrical gear, which in turn rotates a transmission shaft, which in turn rotates the mounting frame and support rollers, thus adjusting the position of the support rollers. Ultimately, this ensures that all three support rollers contact the mandrel simultaneously with uniform contact surface size, facilitating the adjustment of the support rollers. In actual use of the above device, although the support rollers play a limiting role, there are three sets of support rollers. When the three sets of support rollers clamp the mandrel, the support rollers need to be adjusted in sequence so that each set of support rollers can fit against the surface of the mandrel, which will result in low limiting efficiency.

[0003] Therefore, we proposed a metal pressure core calibration device for pressure sensors that can effectively solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a calibration device for a metal pressure core of a pressure sensor, in order to solve the problems mentioned in the background art. Currently, pressure sensor cores on the market are preheated to reach the calibration temperature, but the additional heating increases the calibration time, resulting in poor performance. Also, when the three sets of support rollers clamp the core, the support rollers need to be adjusted sequentially to ensure that each set of support rollers fits against the surface of the core, which leads to low limiting efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a calibration device for a metal pressure core of a pressure sensor, comprising a constant temperature chamber, wherein a base is fixed inside the constant temperature chamber; The rear end of the base is rotatably connected to a first threaded rod, and the top of the first threaded rod extends out of the interior of the constant temperature chamber and is connected to the bottom of the motor. The bottom of the motor is fixed to the top of the constant temperature chamber. A measuring device is threadedly connected to the first threaded rod and is slidably connected to the base.

[0006] Preferably, the base is internally rotatably connected to a second threaded rod, and the second threaded rod has two sets of opposite threads.

[0007] Preferably, the second threaded rod has two sets of threads on which mounting plates are threadedly connected, and the bottom of the mounting plate slides inside the base, and a placement plate is welded to the inner side of the top of the mounting plate.

[0008] Preferably, a clamping plate is slidably connected inside the top of the mounting plate, and a locking block is slidably connected inside the clamping plate.

[0009] Preferably, the outer end of the card block extends into the interior of the card slot to form a locking mechanism, and the card slots are equally spaced inside the mounting plate.

[0010] Preferably, the inner end of the card block is connected to a return spring, and the inner end of the return spring is connected inside the clamping plate to form a limiting mechanism.

[0011] Preferably, the inner end of the clamping block is connected to a pull rope, and the top of the pull rope extends out of the interior of the clamping plate through a roller to form a sliding mechanism, and the roller is connected to the interior of the clamping plate through a bearing.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the pressure sensor metal pressure core calibration device is highly efficient and convenient; the use of a constant temperature chamber can improve the stability of the detection; and the use of a clamping plate allows for the clamping of pressure sensor metal pressure cores of different sizes, thereby improving the ease of use. The specific details are as follows: (1) A constant temperature chamber is provided. The constant temperature chamber can be used to heat and keep the metal pressure core of the pressure sensor constant temperature, which makes it easier for the measuring instrument to detect the metal pressure core of the pressure sensor, thereby improving the detection efficiency. (2) A clamping plate is provided. By moving the clamping plate, the clamping plate can clamp the metal pressure core of the pressure sensor through the placement plate, thereby fixing the metal pressure core of the pressure sensor and improving the convenience of measurement. (3) A reset spring is provided. The reset spring is connected to the inner end of the card block, and the inner end of the reset spring is connected to the inside of the clamping plate to form a limiting mechanism, thereby enabling the reset spring to limit the card block, thus improving the stability of the card block. (4) A locking block is provided, and the outer end of the locking block extends into the interior of the slot to form a locking mechanism. The slots are equally spaced inside the mounting plate, so that the clamp can be fixed on the mounting plate after the locking block and the slot are engaged, thereby improving the stability of the clamp. (5) A roller is provided, and a pull rope is connected to the inner end of the clamp. The top of the pull rope extends out of the inside of the clamp through the roller to form a sliding mechanism. The roller is connected to the inside of the clamp through a bearing, which reduces the wear of the pull rope and improves the service life of the pull rope. Attached Figure Description

[0013] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a schematic diagram of the connection structure between the constant temperature chamber and the motor of this utility model; Figure 3 This is a schematic diagram of the connection structure between the base and the placement plate of this utility model; Figure 4 This is a schematic diagram of the connection structure between the mounting plate and the placement plate of this utility model; Figure 5 This is a schematic diagram of the connection structure between the mounting plate and the placement plate of this utility model; Figure 6 This is a schematic diagram of the connection structure between the card block and the card slot of this utility model.

[0014] In the diagram: 1. Constant temperature chamber; 2. Sealed door; 3. Motor; 4. First threaded rod; 5. Measuring instrument; 6. Base; 7. Second threaded rod; 8. Mounting plate; 9. Placement plate; 10. Clamping plate; 11. Locking block; 12. Locking groove; 13. Return spring; 14. Pull rope; 15. Roller. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example 1: A calibration device for a metal pressure core of a pressure sensor solves the problem of low measurement efficiency caused by the need for preheating and pressurizing to eliminate stress or apply prestress in existing methods. The use of a constant temperature chamber 1 can improve calibration efficiency. The following is disclosed: A base 6 is fixed inside the constant temperature chamber 1; a first threaded rod 4 is rotatably connected to the rear end of the base 6, and the top of the first threaded rod 4 extends out of the constant temperature chamber 1 and is connected to the bottom of the motor 3. The bottom of the motor 3 is fixed to the top of the constant temperature chamber 1. A measuring device 5 is threadedly connected to the first threaded rod 4, and the measuring device 5 is slidably connected to the base 6. refer to Figure 1 and Figure 2 The metal pressure core of the air conditioning refrigerant pressure sensor is placed inside the constant temperature chamber 1, and the sealing door 2 is closed to form a seal between the sealing door 2 and the constant temperature chamber 1. The constant temperature chamber 1 is then started to control its internal temperature. After the temperature rises to the test temperature, the first threaded rod 4 is driven by the motor 3 to rotate, which in turn drives the measuring device 5 to move. This movement allows the measuring device 5 to contact the surface of the metal pressure core of the air conditioning refrigerant pressure sensor, thereby calibrating the metal pressure core of the air conditioning refrigerant pressure sensor. This improves the accuracy of the calibration and the efficiency of the test.

[0017] Example 2: A calibration device for a pressure sensor metal pressure core solves the problem of poor adjustability of existing pressure sensor metal pressure cores of different sizes. The use of a second threaded rod 7 improves the adjustment efficiency. The following is disclosed: The base 6 is rotatably connected to a second threaded rod 7, and the second threaded rod 7 is provided with two sets of opposite threads. The two sets of threads on the second threaded rod 7 are threadedly connected to mounting plates 8, and the bottom of the mounting plates 8 slides inside the base 6. A placement plate 9 is welded to the inner side of the top of the mounting plates 8. refer to Figures 1 to 4 When calibrating metal pressure cores of air conditioning refrigerant pressure sensors of different sizes, rotating the second threaded rod 7 allows the mounting plate 8 to move, which in turn allows the mounting plate 8 to slide on the base 6. The two sets of opposite threads on the second threaded rod 7 allow the two sets of mounting plates 8 to slide in opposite positions, thus adjusting the distance between the mounting plates 8. This allows for adaptation to metal pressure cores of air conditioning refrigerant pressure sensors of different sizes, thereby improving the adaptability of the calibration of the metal pressure cores of air conditioning refrigerant pressure sensors.

[0018] Example 3: A calibration device for a metal pressure core of a pressure sensor solves the problem that when using three sets of support rollers to clamp the core rod, the support rollers need to be adjusted sequentially to ensure that each set of support rollers is in contact with the surface of the core rod, which leads to low limiting efficiency. The device improves the limiting efficiency by using a clamping plate 10. The following is disclosed: A clamping plate 10 is slidably connected to the top of the mounting plate 8, and a locking block 11 is slidably connected to the inside of the clamping plate 10. The outer end of the locking block 11 extends into the inside of the locking groove 12 to form a locking mechanism. The locking groove 12 is evenly spaced inside the mounting plate 8. A return spring 13 is connected to the inner end of the locking block 11, and the inner end of the return spring 13 is connected to the inside of the clamping plate 10 to form a limiting mechanism. A pull rope 14 is connected to the inner end of the locking block 11, and the top of the pull rope 14 extends out of the inside of the clamping plate 10 through a roller 15 to form a sliding mechanism. The roller 15 is connected to the inside of the clamping plate 10 through a bearing. refer to Figures 3 to 6The metal pressure core of the air conditioning refrigerant pressure sensor is placed on the placement plate 9. Then, the pull rope 14 is pulled, which drives the locking block 11 to move via the roller 15. This causes the locking block 11 to disengage from the locking slot 12 and slide into the clamping plate 10. The movement of the locking block 11 compresses the return spring 13, allowing the clamping plate 10 to slide inside the mounting plate 8. The clamping plate 10 then works with the placement plate 9 to clamp and limit the metal pressure core of the air conditioning refrigerant pressure sensor. After the clamping plate 10 is in position, the force of the return spring 13 pushes the locking block 11 into the locking slot 12 to form a lock, thus fixing the clamping plate 10 to the mounting plate 8. The movement of the clamping plate 10 can limit the movement of metal pressure cores of air conditioning refrigerant pressure sensors of different sizes, thereby improving the stability and adaptability of calibration.

[0019] Working principle: When using this pressure sensor metal pressure core calibration device, firstly, refer to... Figure 1 and Figure 2 The metal pressure core of the air conditioning refrigerant pressure sensor is placed inside the constant temperature chamber 1, so that the sealing door 2 can form a seal with the constant temperature chamber 1, allowing the constant temperature chamber 1 to control the internal temperature. The motor 3 drives the first threaded rod 4 to rotate, which in turn causes the measuring device 5 to move and contact the surface of the metal pressure core of the pressure sensor, thus improving the accuracy of calibration and the efficiency of detection. refer to Figures 1 to 4 When calibrating the metal pressure core of the air conditioning refrigerant pressure sensor of different sizes, by rotating the second threaded rod 7, the mounting plate 8 can be moved and slid on the base 6. The two sets of opposite threads on the second threaded rod 7 allow the spacing between the mounting plates 8 to be adjusted, thus improving the adaptability of the calibration of the metal pressure core of the air conditioning refrigerant pressure sensor. refer to Figures 3 to 6 The metal pressure core of the air conditioning refrigerant pressure sensor is placed on the placement plate 9. Then, the pull rope 14 is pulled, which causes the locking block 11 to move and disengage from the locking slot 12. The locking block 11 slides into the clamping plate 10, thereby compressing the return spring 13. Then, the clamping plate 10 can slide inside the mounting plate 8. After the clamping plate 10 moves to the position, the force of the return spring 13 pushes the locking block 11 into the locking slot 12 to form a lock. Then, the movement of the clamping plate 10 can limit the metal pressure core of the air conditioning refrigerant pressure sensor of different sizes, thereby improving the stability and adaptability of calibration.

[0020] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0021] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A calibration device for a metal pressure core of a pressure sensor, comprising a constant temperature chamber (1), wherein a base (6) is fixed inside the constant temperature chamber (1). Its features are, The rear end of the base (6) is rotatably connected to a first threaded rod (4), and the top of the first threaded rod (4) extends out of the interior of the constant temperature chamber (1) and is connected to the bottom of the motor (3). The bottom of the motor (3) is fixed to the top of the constant temperature chamber (1). A measuring device (5) is threadedly connected to the first threaded rod (4), and the measuring device (5) is slidably connected to the base (6).

2. The pressure sensor metal pressure core calibration device according to claim 1, characterized in that: The base (6) is internally rotatably connected to a second threaded rod (7), and the second threaded rod (7) is provided with two sets of opposite threads. The two sets of mounting plates (8) can be controlled to move in opposite positions through the second threaded rod (7), thereby facilitating the clamping function.

3. The pressure sensor metal pressure core calibration device according to claim 2, characterized in that: The second threaded rod (7) has two sets of threads connected to mounting plates (8), and the bottom of the mounting plate (8) slides inside the base (6). A placement plate (9) is welded to the inner side of the top of the mounting plate (8), so that the placement plate (9) can limit the metal pressure core of the air conditioning refrigerant pressure sensor.

4. The pressure sensor metal pressure core calibration device according to claim 3, characterized in that: The mounting plate (8) has a sliding connection to a clamping plate (10) at its top, and a locking block (11) is slidably connected inside the clamping plate (10), so that the clamping plate (10) can slide to fit and limit the metal pressure core of the air conditioning refrigerant pressure sensor.

5. The pressure sensor metal pressure core calibration device according to claim 4, characterized in that: The outer end of the card block (11) extends into the interior of the card slot (12) to form a locking mechanism, and the card slots (12) are equally spaced inside the mounting plate (8), so that the clamping plate (10) can be fixed by connecting the card block (11) and the card slot (12).

6. The pressure sensor metal pressure core calibration device according to claim 4, characterized in that: The inner end of the card block (11) is connected to a reset spring (13), and the inner end of the reset spring (13) is connected to the inside of the clamp plate (10) to form a limiting mechanism, so that the reset spring (13) can limit the card block (11).

7. A pressure sensor metal pressure core calibration device according to claim 4, characterized in that: The inner end of the card block (11) is connected to a pull rope (14), and the top of the pull rope (14) extends out of the interior of the clamp plate (10) through a roller (15) to form a sliding mechanism. The roller (15) is connected to the interior of the clamp plate (10) through a bearing, so that the roller (15) can reduce the wear caused by the use of the pull rope (14).

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